Cigarette-making machine



F. F. RUAU'ET AL CIGARETTE MAKING MACHINE 2 Sheets-Sheet 4l Filed NOV. '7, 1941 [iwan/fors Nov. 7, 1944.

Nov. 7, v1944. F, RUAU ETAL 2,362,225

CIGARETTE MAKING MACHNE lPatented Nov. 7, 1944 win, v Molins'Machine London, England Deptford, London, England, assignors to Company Limited, Deptford,

Application November 7, 1941,-seria1'Ne.`41s,272 i In Great Britain December 10, 1940 i "2' Claims. (Gl. ISI- 110) `This invention concerns improvements in or relating to. cigarette making machines of the continuous rod type.v

In such machines tobacco is showered on to a moving band or thelike which conveys the tobacco along as a streamand during thev movement the tobacco is formed into the desired crosssectional shape and enclosed in a paper tube to produce the continuous rod which is thereafter cut into single cigarettes. f The folding of the continuous web of cigarette paper around the tobacco core takes place in a part of the machine known as the garniture. It is well known that during these tobacco conveying and folding operations 'a quantity of `tobacco dust or other line particles of tobacco, hereinafter referred to as dust, tends to be deposited upon the various elements of the garniture and other stream supporting means and it is usually considered desirable toremove such dust and particles as quickly as possible'from the vicinity of the garniture and other parts.

In practice it is usual to employ, for the purpose of effecting this cleaningpperation, asuction nozzle which is positioned above the stream supporting means, for example, the garniture adjacent the points at which the dust tends to be deposited. Previously, however, the pipes or conduits from the suction nozzle have been so arranged as to extend upwardly from the garniture and to trail over the bed of the cigarette making machine. Thisarrangement involves a number of undesirable obstacles which are in the way when it is desired to service the machine.

According to the present invention there is provided in or for a cigarette making machine of thecontinuous rod type a dust suction device, which comprises ducts which are arranged in the tobacco-stream-supporting-means and through which dust may be drawn downwardly. A shield may be disposed above the stream so as to provide a chamber with which the ducts communicate. x l

Further according to the present invention there is provided a device for removing dust particles from the vicinity of the garniture of a cigarette making machine of the continuous rod type, wherein a source of suction is connected with ducts in the garniture so as to draw dust downwardly through the ducts and wherein a shield is disposed above the garniture to guide dust into said ducts. 'I'he source of suction may be connected with a support for the garniture or other tobacco stream supporting means, the

support being provided with ducts communicating with those in the said means, whereby dust isdrawn downwardlyY through the ducts in both the stream supporting means and the support. Partitions may be disposed within the garniture shield and arranged to extend upwardlyL from the garniture at positions adjacent to those at which dust normally tends to accumulate, the upper edges of the partitions. `terminating below the top of the shield whereby the dust is drawn upwardly over the Vpartitions and thereafter downwardly into said ducts;V 'I'he shield may be arranged partly or wholly` to envelop a tongue piece which co-operateswith the garniture.

An embodiment of the invention will now-be described with reference to the accompanying drawings in which:

Figurel is a side elevation of part of a continuous rod cigarette making machine showing the garniture and the devices for' feeding the tobacco ller and paper web thereto.

Figure 2 is a plan of Figure 1.

Figure 3 is an end elevation of Figure 1 looking in the direction of thearro'w-3.

Figure 4 is a section of Figure 2 on the line Figure 5 is a section of Figure 2 on the une 5 5.

Referring to the drawings, tobacco is fed by f any suitable tobacco feeding mechanism (not shown) and the tobacco stream formed thereby is delivered onto a cigarette paper web 6 which in turn is supported by an endless band l, is conveyed-through the garniture (indicated generally by the arrows 8) which folds the paper web about the tobacco stream to `form the continuous cigarette rod. This garniture may be of any suitable construction. Co-operating with the garniture is a tongue element 9 beneath which the tobacco stream passes. Above the tongue and resting on the garniture is a box-like shield I0, the 'open side of which is adjacent the garniture, the tongue 9 depending from a bracket 44 on which it is mounted by means of a thumb screw 43 received on a threaded opening 42 in the bracket. The shield is so arranged so as almost completely to envelop the tongue. I The shield is provided with partitions Il and I2, see Figures 3, 4, and 5, which form channels l1 extending lengthwise in the direction of movement of the tobacco through the garniture. The partitions H extend upwardly from the garniture and are arranged to have their lower edges in engagement with the garniture. The upper edges of these partitions terminate before they reach the top of the shield. Other partitions I2 which c0- @UNITDjsTATEs PATENT orifice.vl

operate with the partitions II to form the channels extend downwards from the shield. The construction is clearly shown in Figure 4. In this way the channels I1 serve to guide the dust which is sucked upwardly by the suction device referred to below, into ducts I3 formed in the garniture and which= extend downwardly theretliroughl and into a garniture support I4 which is secured to the bed 20 of the cigarette making machine. Ducts I5 are also provided in the sup'- port and communicate with the ducts I3v formed in the garniture and also with a suction conduit I6 connected with any suitable means, such asl a fan I8 for producing suction. This fan* is' indi'- cated diagrammatically in Figure 2. The con'- duit extends downwardly into the bed of the cigarette making machine so that onlytheshield. and

hollow bracket I9 leading `from the duct I5- tothe conduit I6 are located above the bed4 20 oi the cigarette making machine and only the said shield' is' locatedy directly above the; garniture.

It is-found'v that. the dust tends to collectfmost- 153 at positions. adjacent'those where the tongue closely co-operatesA withI the garniture; It will. De-seem from Figure 4 that thepartitions, I2 extend: into close proximity with the upper face of:v the.- garniture and form a. restricted passage for; theair andthus the velocity' thereof is rela-- tively high. at the positionf where. dust tends to accumulate. By arranging the shieldv in the:

manner above described, the dust. can-abe' removed: almostA as soonas it is raised or as it settles1 on the garniture or the tongue.

As. abovey stated, the tobacco dust is drawnl upwardly` between the guiding4 partitions disposed. A

in the shield, over the tops thereof and downwardlyth-rough the ducts. in the garniture and its support, the dust being thereafter' conducted to: some suitable receptacle a-tapositionA remote. from that at which it is removed from the` garniture.

What we claim as; ourv invention and desire to secure by Letters Patenti is:

1. Dust removing apparatus for use with cigarette making machines of the continuous rodtype having a support along which a stream of tobacco is conveyed, said apparatus comprising a shield associated with said support and extending above said tobacco stream to form a dust chamber overlying the'streanr, a duct communicating with said chamber and aiording a passage extending downwardly from said chamber and into said support, suction means for withdrawing air and entrained dust from said chamber downwardly through said passage, and upstanding partitions disposed within said chamber at' each. side of said stream and extending in' the direction of movement of the latter, said partitions being so positioned that air and entrained dust removed from said chamber are caused to flow upwardly over said partitions and downwardly into said ducts.

2. Dust removing apparatus for use with cigarette makingv machine of the continuous rodI type lia-ving` a bed, and an'- endless bandi on which a stream of tobacco is conveyedalong saidlbed and through a. garniture, said apparatus: comprising al shield extending. above said garniture to form adust. chamber overlyingV the tobacco stream, a duct communicating' with: saidv chamber and aiiording; a. passage extending` downwardly from said chamber through said' garniture and into. said bed: adjacent. said. garniture, suction means for. withdrawing.' air and entrained dust from said chamber downwardly through said passage, and devices associated with said dust chamber` and; extending into` close' proximity.' with the upperv face of said garnitureI to afford. a restricted passage for the air so withdrawn, whereby the. velocity of the moving air is relativelyy highv adjacent the garniture face;

FELIX FREDERIC RUAU. HARRY BALDWIN. 

